<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<?php
			//ini_set("error_reporting","E_ALL & ~E_NOTICE");
		    $a = 100; //声明变量并赋值
		    echo "输出变量$a,输入转义\t字符"; //双引号
		    echo "<br/>";
		    echo '输出变量$a，输入转义\t字符'; //单引号
		?>
	</body>
</html>